Question

A mother is now nine times as old as her son. In four years' time she will be five times as old as her son.What are their present ages

Answer 1

son = 4

mom=36

m = 9s

m + 4 = 5(s+4)

m + 4 = 5s + 20

9s + 4 = 5s + 20

4s = 16

s = 4

m = 36

Explanation: